Wing-spar construction for aeroplanes



0'. T. BELCHER. WING'SPAR'CONSTRUCTION FOR AEROPLANES.

APPLICATION FILED AUG.9. 1921. V 1,417,657. n e May 30, 1922.

siding at Los Angeles,

UNETEQ stares osrnnn/ OSMOND THERON BELCHER, OF LOS ANGELES, CAIIFORNIA, ASSIG-NOR T0 BELCHER AERIAL lWAINUFAOTURING COMPANY,

a oonron'arion on CALIFORNIA.

WING-SPAR CONSTRUCTION FOR AEROPLANES.

' Application filed August 9,1921.

T 0 all whom it may concern.

Be it known that I, OSMOND THERON BELCHER, a citizen of the in the county of Los Angeles and State of California, have invented new and useful Improvements in VVing-Spar Constructions for Aeroplanes, of which the following is a specification.

My invention relates to improvements in wing spar construction for aeroplanes; the objects of the present invention being to provide a new and useful cord member for the internal bracing of wings and fuselage; to be used. more particularly in the building up of cantilever wing spars; to make a wing spar cord member having rigid brace seats and a construction in which the weight of the material used is disposedto give the greatest strength and stiffness.

With reference to the drawings,

Fig. 1 is a view in elevation of a section of a cantilever wing spa-r showing a novel construction of top and bottom cord memers. Fig. 2 is a top view of a cord member as shown in F ig. 1 showing a brace seat block having a single face and a second brace seat block having a double face.

Fig. 3 is an end view of a cord member having a single faced brace seat block.

Fig. 4 is an end view of a cord member showing a brace seat block having a double face. 5

Fig. 5 is a perspective view of the several parts composing a cord member where such members are built up rather than being'cut out from solid pieces as shown in the first four figuresr F ig. 6 shows an end elevation of a cord member and brace seat block having two faces.

' Fig. 7 is a top view of a cord member having brace seat blocks constructed with two faces.

In the present invention in order to obtain from the material used for the cord members 1 and 2 the greatest resistance to compression and tension stresses, the cord members are made T-shaped as shown in Figs. 1 to 5 inclusive, for such cord members as are adaptedto be supported by a single brace as shown in Fig. 1, there being a plate 3 upon which are fixed brace seat blocks 4 having a Specification of Letters Patent.

United States, re-

Patented May 30, 1922.

Serial No. 4290,5354.

face 5 and between the brace seat blocks 4 are ribs 6.

Two such supported by a continuous laminated wood brace 7, the brace being glued into the seats and bound with heavy thread 8.

Such a cord member may also carry brace seats 9 having two faces 10, 10 as shown in Fig. 2, and be adapted to seat anglingly two braces 11, 11 as shown in Fig. 4;.

The cord members may be milled out of solid sticks of wood with the'brace seats 4 0119 and the ribs 6 integral with the plate 3,

or as shown in Fig. 5 brace seats 12, ribs 13 and plates 14- may be made separately and glued together into a strongly constructed built up cordmember.

In the use of double faced brace seats and with two braces mounted anglingly in the seatsthe rib 6 maybe divided into two ribs 15, 15 as shown in Figs. 6 and 7, the two ribs being set in line with the two angling braces. Such a construction of the cord member may also be milled from solid sticks or made up of individual members as shown for the singleribbed cord members in Fig. 5. I Such a construction of cord members while providing the greatest possible rigidity from the weight of material used also presents a very wide surface 16 against which the covering ofthe wings may bear.

It is obvious that various changes might be made in the invention as shown without departing from the spirit thereof as claimed.

Having thus described my invention, I claim 1. In a wing spar construction for aeroplanes, a cord member comprising a plate,

cord members are intended to be brace seat blocks formed upon the plate and ribs made integral with the plate and the up between the brace seat blocks and the plate and extending between the blocks, positioned upon the plate and extending up there being one rib in alignment with each between the blocks and a continuous lamiof said angling brace seat faces. nated zigzag wood brace element extending 10 4. In a wing spar construction for aerobetween the two spaced-cord members and 5 planes, a pair of spaced cord members each having the angular bends thereof positively of which being composed of a plate brace seated in the said brace seat blocks. seatblocks mounted upon the plate and ribs OSMOND THERON BELCHER. 

